I recently replaced my Dunlop 739's for a Maxxis IT for the rear and the Si on the front as recommended in this Forum. I ride in Michigan Intermediate to soft trails. The 739's I was told were junk and and I can now confirm this myself from my riding experience. I was riding single track trails and was going into corners hotter than I should have trying to stay in front of my buddies 525EXC and more then once thought I lade it down to far but those Maxxis gripped and pulled me back up. Riding in open soft sand is much improved as well. For what its worth, that is what I experienced.